Title :
Nonlinear effects of a modal domain fiber-optic sensor in a vibration suppressor control loop for a flexible structure
Author :
Lindner, D. ; Delos, Peter L.
Author_Institution :
Fiber & Electro-Opt. Res. Center, Virginia Polytech. Inst. & State Univ., Blacksburg, VA
Abstract :
The performance of a velocity feedback control system for vibration suppression in a flexible beam using a modal domain fiber-optic sensor is discussed. The degradation in performance due to a sine wave nonlinearity at the output of the sensor is studied. It is shown that limit cycles could exist for certain parameter values; in particular, when a lightly damped beam has low natural frequencies, the loop gain of the control system is large, and the sensor has limited dynamic range. A one-mode model of the beam with static velocity feedback is assumed
Keywords :
distributed parameter systems; feedback; fibre optic sensors; limit cycles; velocity control; vibration control; flexible beam; flexible structure; lightly damped beam; limit cycles; modal domain fiber-optic sensor; one-mode model; performance degradation; sine wave nonlinearity; static velocity feedback; velocity feedback control system; vibration suppressor control loop; Control systems; Degradation; Dynamic range; Feedback control; Frequency locked loops; Lighting control; Limit-cycles; Optical fiber sensors; Sensor systems; Vibration control;
Conference_Titel :
Southeastcon '90. Proceedings., IEEE
Conference_Location :
New Orleans, LA
DOI :
10.1109/SECON.1990.117785
